Mechanical Supplies

SWSI cabinet fans

About

Single width single inlet centrifugal fans, Twin City's BAE-SW airfoil range, supplied in an acoustically lined cabinet with belt or direct drive and internal vibration isolation. The airfoil wheel is the most efficient centrifugal profile, and the lined cabinet is what lets a high static duty be delivered from a plant room with the noise contained.

Application

Applied to car park extract, kitchen extract, stair pressurisation and general supply where duty is high and the fan sits in or near occupied areas. The lined cabinet cuts breakout noise by 10-15 dB against a bare fan, which is often the difference between meeting the neighbouring room criterion and having to build an acoustic enclosure after handover.

Standards & Reference 7 cited

AMCA 210
The laboratory method for testing fan aerodynamic performance: airflow, pressure, power and efficiency. A fan curve that is not tested to this is not comparable with one that is.
AMCA 211
The certified aerodynamic ratings programme: the equivalent independent verification for a published fan performance curve.
AMCA 300
The reverberant room method for measuring the sound a fan emits. The source of the sound power figures used in an acoustic calculation.
AMCA 311
The certified sound ratings programme: independent verification that a published sound rating is what the fan actually produces.
AMCA 99
The standards handbook: the definitions, classifications and construction classes the rest of the AMCA standards refer back to.
ISO 5801
The international method for testing industrial fan performance using standardised airways. It is the ISO counterpart to AMCA 210.
UL 705
Power ventilators: the safety listing for powered fans in North American specifications.